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Random delayed-choice quantum eraser via two-photon imaging
Authors:G Scarcelli  Y Zhou  Y Shih
Institution:(1) Department of Physics, University of Maryland, Baltimore County, Baltimore, MA 21250, USA;(2) Dipartimento Interateneo di Fisica, Universita' di Bari, 70126 Bari, Italy
Abstract:We report on a delayed-choice quantum eraser experiment based on a two-photon imaging scheme using entangled photon pairs. After the detection of a photon which passed through a double-slit, a random delayed choice is made to erase or not erase the which-path information by the measurement of its distant entangled twin; the particle-like and wave-like behavior of the photon are then recorded simultaneously and respectively by only one set of joint detection devices. The present eraser takes advantage of two-photon imaging. The complete which-path information of a photon is transferred to its distant entangled twin through a “ghost" image. The choice is made on the Fourier transform plane of the ghost image between reading “complete information" or “partial information" of the double-path.
Keywords:PACS" target="_blank">PACS    03  65  Ud Entanglement and quantum nonlocality (e  g  EPR paradox  Bell's inequalities  GHZ states  etc  )  42  50  Xa Optical tests of quantum theory  42  50  Dv Nonclassical states of the electromagnetic field  including entangled photon states  quantum state engineering and          measurements
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